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LM4670 Datasheet(Fiches technique) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Numéro de pièce LM4670
Description  Filterless High Efficiency 3W Switching Audio Amplifier
Télécharger  18 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
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Electrical Characteristics (Notes 1, 2)
The following specifications apply for A
V = 2V/V (RI = 150k
Ω), R
L =15µH+8
Ω + 15µH unless otherwise specified. Limits
apply for T
A = 25˚C. (Continued)
Symbol
Parameter
Conditions
LM4670
Units
(Limits)
Typical
Limit
(Note 6)
(Notes 7, 8)
P
O
Output Power
R
L =15µH+8
Ω + 15µH,
THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD =5V
V
DD = 3.6V
V
DD = 2.5V
1.65
850
400
W
mW
mW
R
L =15µH+8
Ω + 15µH,
THD+N = 1% (max)
f = 1kHz, 22kHz BW
V
DD = 5V,
V
DD = 3.6V,
V
DD = 2.5V,
1.35
680
325
600
W
mW (min)
mW
THD+N
Total Harmonic Distortion + Noise
V
DD = 5V, PO =1WRMS,
f = 1kHz
0.35
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 1kHz
0.30
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 5kHz
0.30
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 10kHz
0.30
%
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 217Hz
Inputs to AC GND, C
I = 0.1µ,
Input Referred
68
dB
PSRR
Power Supply Rejection Ratio
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 1kHz
Inputs to AC GND, C
I = 0.1µF
Input Referred
65
dB
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 217Hz
f
IN = 1kHz, PO = 10mWRMS
Input Referred
62
dB
SNR
Signal to Noise Ratio
V
DD = 5V, PO =1WRMS
93
dB
e
OUT
Output Noise
V
DD = 3.6V, f = 20Hz – 20kHz
Inputs to AC GND, C
I = 0.1µF
No Weighting, Input Referred
85
µV
RMS
V
DD = 3.6V, Inputs to AC GND
C
I = 0.1µF, A Weighted
Input Referred
65
µV
RMS
CMRR
Common Mode Rejection Ratio
V
DD = 3.6V, VRipple =1VPP Sine
f
Ripple = 217Hz, Input Referred
80
dB
T
WU
Wake-up Time
V
DD = 3.6V
1.35
ms
T
SD
Shutdown Time
V
DD = 3.6V
0.01
ms
Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
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